Roof waterproofing with mineral base liquid membranes

1 Concrete Repair
KÖSTER Betomor Multi A
KÖSTER Repair Mortar Plus
2 Primer
KÖSTER Polysil TG 500
3 Installing fillets
4 Waterproofing wall / floor junctions
KÖSTER Superfleece
5 Waterproofing layer
6 Reinforcement
KÖSTER Flex Fabric
KÖSTER Glass Fiber Mesh

Damaged roofs and structures may require multiple products for proper protection. Substrate preparation is a key factor for a durable renovation. It must provide a sound basis for the area waterproofing. The waterproofing  system should have multiple advantages, such as being liquid applied and therefore seamless. It should also have crack-bridging capabilities. 

KÖSTER 21 is a 2 component, solvent-free, liquid applied, elastic, crack bridging waterproofing material with excellent adhesion to dry and moist substrates that meets all these requirements. It is liquid applied and therefore seamless, which greatly eases application to complicated architectural details. Due to its UV stability it is suitable for indoor and outdoor use.

The white color reflects sunlight and reduces building surface temperatures. The fast curing coating is highly flexible, resistant to occasional foot traffic, aging, hydrolysis, UV-rays, frost, and salt. KÖSTER 21 seals up to 2 bar against synthetic oils and aliphatic hydrocarbons with high boiling points. KÖSTER 21 does not contain volatile organic compounds (VOC content = 0), is free of polyurethanes, isocyanates, and bitumen.

Always adhere to the specifications in the respective Technical Guidelines.



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